saved several bytes in BASIC editor

src/basic/editor/find_line.s

@@ -17,42 +17,16 @@ find_line:
 	lda TXTTAB+1
 	sta OLDTXT+1
 
-	// Check if BASIC text actually contains any program
-
-	lda #$00
-
-#if CONFIG_MEMORY_MODEL_60K
-	ldx #<OLDTXT+0
-	jsr peek_under_roms
-	cmp #$00
-#elif CONFIG_MEMORY_MODEL_46K || CONFIG_MEMORY_MODEL_50K
-	jsr peek_under_roms_via_OLDTXT
-	cmp #$00
-#else // CONFIG_MEMORY_MODEL_38K
-	lda (OLDTXT),y
-#endif
-
-	bne find_line_loop
-
-	iny
-
-#if CONFIG_MEMORY_MODEL_60K
-	ldx #<OLDTXT+0
-	jsr peek_under_roms
-	cmp #$00
-#elif CONFIG_MEMORY_MODEL_46K || CONFIG_MEMORY_MODEL_50K
-	jsr peek_under_roms_via_OLDTXT
-	cmp #$00
-#else // CONFIG_MEMORY_MODEL_38K
-	lda (OLDTXT),y
-#endif
-
-	beq find_line_fail
-
 	// FALLTROUGH
 
 find_line_loop:
 
+	// Check if line is not empty
+
+	jsr peek_line_pointer_null_check
+	bcc find_line_fail
+
+
 	// Fetch the high byte of line number and compare
 	ldy #$03